The bank is the most important building on Medieval Unlimited. There you can deposit or withdraw money to your personal account, pay other players, and more to manage your Kingdom's funds.
Unlike on other servers, depositing money into your personal account requires you to physically bring it to the bank - but be careful, it's not uncommon for rogue players to take advantage of a traveler with loaded pockets. Plan your trips to the bank carefully, and keep in mind the bank is closed after dark.
The bank is located in Maids Morten.